Pieter Jansz. Liorne

Pieter Jansz. Liorne (1561–1620) was a merchant and ship-owner of Hoorn in Holland. He traded across the Baltic and with Italy and served his town as burgomaster and director of the Dutch East India Company's Hoorn chamber.

He is credited as the chief initiator of the lengthened fluyt, a cheap bulk cargo ship decisive for Dutch seaborne trade. In 1618 Stadholder Maurice dismissed him, probably for sympathising with the Remonstrants.